Pole-making machine



D. B. HANNA.

POLE MAKING MACHINE.

APPLICATION FILED MAY 22. 1919.

Patented-Mar. 28, 1922.

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D. B. HANNA.

.POLE MAKING MACHINE.

APPLICATION FILED MAY 22, 1919,

Patented Mar. 28, 1922.

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WITH ESS APPLICATION FILED MAY 22. P919.

Patented Mar. 28, 1922.

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INVENTOR.

B. HANNA. POLE MAKING MACHINE.

APPLICATION FILED MAY 22, I919.

Parnted Mar. 28, 1922.

WITNESS D. B. HANNA.

POLE MAKING MACHINE. APPLICATION FILED MAY 22, 15119.

Patented Mar. 28, 1922.

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DAVID 13. HANNA, OF CHICAGO, ILLINOIS, ASSIGNOR TO MASSEY CONCRETE PRODUCTS CORPORATICN, CHICAGO, ILLINOIS, A. CORPORATION OF VIRGINIA.

POLE-MAKING MACHINE.

. Application filed May 22,

i To all whom it may concern:

Be it known that I, DAVID B. HANNA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pole-Making Machines, of which the following is aspecification. i

This invention relates to pole making machines and particularly to an improvement whereby I propose to directly drive the pole mold, instead of driving the samethrough intermediate mechanis'm'such for example as the usual enclosing case or shell rotatably mounted in suitable frame Work.

One of the primary objects of my invention is to provide an improved construction of simple character by means of which I am enabled to drive the pole mold directly. Another object of my invention resides in the provision of an improved supporting mecha nism for the mold by means of which I am enabled not only to greatly reduce the numher, size and weight of the parts, but also to employ a direct drive.

Still another object of my invention is the provision of an improved supporting mecha nism whereby the handling of the mold may be greatly facilitated, and the cost of production reduced.

The foregoing, together with such other objects, as may-hereinafter appear, or are incident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings wherein: l

Figure 1 is a side elevation of a pole making machine embodying my improvements, the machine being broken away intermediate its ends; Figure 2 is an end elevation of the machine shown in Figure 1, but drawn on a much larger scale; Figure 3 is a'section taken on the line 3-3 of Figure 4 illustrating a detail of my invention; Figure 4t is a cross section taken on the line lt-4 of Figure 3; Figure 5 is a cross section taken on the line 55 of Figure 6 illustrating details of the driving mechanism; Figure 6 is a cross section taken on the line 66 of Figure 5; Figure 7 is a side elevation of a portion of a machine embodying a modification ofmy improvements; Figures 8 and 9, respectively, are sections taken on the line 8 -8v ofFigure 9 and 9.9 of Figure 8, illustrating details of'themodified form ofdriving Specification of Letters Patent. Patented 28 1922 1919. Serial No. 298,876.

mechanism employed in the machine illus trated 1n Figure 7 and Figures 10 and 11 are respectively a side and an end elevation of a modification of my invention.

Referring now to Figure 1, it will be seen that the machine comprises a base A, composed of suitable structural members, adapted to be embedded in a suitable bed of concrete. Suitably supported in bearing blocks 8, preferably adjustably mounted on the base of the machine, are a plurality of pairs of spaced flanged rollers 9, arranged at intervals through the length of the machine. A pole mold B, the construction of which will hereinafter be described, is adapted to be revolubly supported on said rollers. The

mold is supported in position in the machine by a plurality of yoke-like members C which are pivoted to the roller shaft 10.,the members O being forked at their lower ends to embrace the shaft on opposite sides of the rollerbearing blocks. Each member C is provided with a roller 11 at its extremity and with a second roller 12 intermediate its ends.

The rollers 11 are so located that the axis of rotation is in a plane drawn through the center of the mold and the center of the shaft 10 on which the member C is pivoted for the reason that the up thrust of the mold, when rotated in the direction of the arrow 13, is in this plane. The rollers 12 are preferably located in a plane cutting the center of the mold and the center of the shaft for the other rollers 9.

The mold B is comprised of a plurality of sections a, b, 0, etc, each of which is comprised of two semi-cylindrical or half shell. sections, flanged. as at 14, whereby the two halves may be bolted together by bolts 15, or otherwise secured. The half sections are also reinforced by longitudinal flanges or ribs 16. At the end the half mold sections are provided with flanges 17 preferably mortised together as indicated in Fig. 1, the flanges being secured together by pins 18, passing through a two-part tire 19 which is recessed to embrace the flanges. The tires 19 which run in the grooved rollers 9, are preferably composed-of two parts or halves, the ends of which are rabbetted as indicated in Figure 1 at 20. In practice, I assemble the upper half sections and the lower half sections by pinning the respective halves of the tires 19 in position over the flanges 17. I

then assemble the two halves of the mold together by bolting the flanges 14 by the bolts 15.

its a means for driving the mold B, I preter to provide a drive shaft 21 driven from the motor :22 and provided with a gear which. meshes with a two-part gear 2% carried by the mold. A mounting is provided for the two-part gear 24; by casting an annular groove 25 in the halves of a section of the mold, i. e., a half of said annular groove isformed in each half section. In assemblage, a half of the gear 24 is slipped into its respective groove oi. a halt section, so that when the two halves ot the mold are assembled and bolted together, the parts of the gear will be brought into proper relation.

\Vhile it is only necessary to provide one such gear 24, and one driving gear 28 meshing therewith, in some cases it may be deto drive the mold at several points, .ich event additional gears 24 may be added as shown. in Figure 1.

The operation is as follows: The two halves of the mold B are secured together with a reinforcing skeleton, where such reim' orcing means is employed, mounted and supportci l in the interior thereof, after which the mold is partially filled with concrete. The mold is then picked up and swunginto position over the machine with the tires 19 engaging the flanged rollers 9. The yoke-like supporting members C are then swung forwardly to assume the position indicated in Figure 2, after which the motor is operated to drive the mold, the mold being rotated at a high rate for a suiiicient period of time to insure the proper distribution of the concrete. By this rotation the concrete is formed into a hollow pole and at the proper time the motor is stopped, the machine brought to rest, and the yokelike members C are swung out of the way clearing the mold B, which may then be picked, up by suitable mechanism and removed; The machine is now ready to receive another mold.

By the location and arrangement of the rollers 11, for the reasons previously pointed out, the mold B will be held in position during rotation, although in some instances it may be desirable to support the free end of theyoke-like member C, as'by a link..

It will be seen from the foregoing that I have provided a very simple supporting mechanism for the mold, as a. result of which I am enabled to handle the mold B with great facility. At the same time I am enabled to dispense with the driving shell utilized in some forms of prior machines, and the driving shell and intermediate shell utilized in other types of machines. This not only reduces the number of. parts, but also eliminates a large portion oi the strain incident to the rotation of the heavier weights. My improved mounting als enables me to directly drive the mold whereas heretofore it has been customary to drive an intermediate member such as an outer or driving shell.

In the modification shown in Figures 7, 8 and 9, instead of a gear drive, I employ a friction drive, substituting for the gear 24, a driving band or shoe. 26, formed in two halves, carried by the respective half molds. The free ends of the band are pinned together as at 27, the drivin shoe being made concentric with the mold g by means of the adjustable shoes 28. (See Fig. 8.) The driving shoe 26 is engaged by a friction roller 29 of the drive shaft 21, which as before, is driven by a motor (not shown).

In the modification shown in Figures 1.0 and 11, I have illustrated another form of means for supporting the mold in the machine. In this form of my invention I provide a plurality of U shaped frame members 30 adapted to be secured to the base of the machine at spaced intervals. The rollers 9, in this case, are supported in these frames in suitablebearing brackets 31. At the top each limb of the frame is provided with an undercut groove or slot 32 in which is slidably mounted a T headed member 33 which carries a pair of opposed bearing blocks 3% in which a roller 35 has a hearing. The members 33 are advanced toward or retracted from the center of the machine by means of threaded members 36. lVhen the members 33 are advanced in position indicated in Figure 11, it will be seen that the rollers 35 will engage the tires 19 of the mold B at a point above the horizontal axis of the mold, as a result of which the mold will be securely held in position against vertical displacement. In order to release the mold, the members 33 are retracted sufficiently to clear the tires 19 permitting the mold to be lifted from the machine.

I claim: I

1. A pole making machine comprising in combination a suitable bed, adapted to revolubly receive and support the polemold, a pole mold releasable means for positioning the mold, and a driving means for rotating the mold having driving engagement with the periphery of the mold.

2. A centrifugal pole making machine comprising in combination a suitable bed, a mold, means for revolubly receiving and supporting the mold on the bed, and means for rotating the mold having driving engagement with the periphery of the mold.

3; A centrifugal pole making machine comprising in combination a suitable bed, a mol means for revolubly receiving and supporting the mold on the bed, motor means for rotating the mold, and a connection between the motor means and the mold having driving engagement with the periphery of the mold.

4:. A centrifugal pole making machine comprising in combination a suitable bed, a mold, means in the bed for directly and revolubly supporting the mold, a releasable device directly engaging the mold for holding it against the supporting means during rotation, and means engaging the periphery of the mold for rotaing the mold.

5. A centrifugal pole making machine comprising in combination a suitable bed, a mold, means in the bed for directly and revolubly supporting the mold, a laterally retractable device directly engaging the mold for releasably holding it against the supporting means durin rotation, and means engaging the periphery of the mold for rotating the mold.

6. A centrifugal pole making machine comprising in combination a suitable bed, a mold, means in the bed for directly and revolubly supporting the mold, a device pivoted on one side of the mold and adapted to be swung thereoverdirectly engaging the mold for holding it against the supporting means during rotation, and means engaging the periphery of the mold for rotating the mold.

7 A centrifugal pole making nrachine comprising in combination a suitable bed, a mold, and a structure for directly and revolubly receiving the mold, said structure includin a suitable base, a movable device cooperating therewith to permit the mold to be readily positioned in the base and to support the same against said base during rotation, and means engaging the periphery of the mold for rotating the mold.

8. A pole making machine comprising in combination a mold, and a support adapted to revolubly receive the mold, said support including a suitable base and a movable device cooperative therewith to permit the mold to be readily positioned in the base and to support the same when in position, said device consisting of a hook-like arm pivoted on one side of the base.

v9. A pole making machine comprising in combination a mold, and a support adapted to revolubly receive the mold, said support including a suitable base and a movable device cooperating therewith to permit the mold to be readily positioned in the base and to support the same when in position, said device consisting of a hook-like arm pivoted on one side of the base, and provided with antifriction means.

10. A pole making machine comprising in combination, a base, pairs of rollers mounted on said base, and a swinging supporting member pivoted on the shaft or axle for one of said rollers.

11. A pole making machine comprising in combination, a base, and a plurality of swinging members, spaced apart and pivoted on one side of the base.

12. In a pole making machine, a pole mold longitudinally divided in halves, and a divided peripheral driving member half of which is mounted on each half mold.

13. In a pole making machine, a pole mold longitudinally divided in halves, and a di vided eripheral driving member half of which is mounted on each half mold, the ends of the halves of the driving member dovetailing in one another. 1

In testimony whereof, I have hereunto signed my name.

DAVID B. HANNA. 

